I can help with the RX bit. Read up on undersampling. This is how
you would do it with a BasicRX card. You can basically sample a
signal higher than 64MHz provided that the bandwidth is less than
64MHz/2. The signal then ends up between 0 and 32MHz and is either
inverted or not. You then need to set the cordic frequency to that
frequency to mix it down to DC on the FPGA.

With the TVRX cards there is a tuner that downconverts a high
frequency signal (FM,UHF,VHF) down to somewhere below 64MHz (depending
on which TVRX revision you have).